Chain making machine



J. L. HOGBERG ET AL 5 CHAIN MAKiNG MACHINE Filed June 1, 1925 5 Sheets-Sheet l (/04): A7. Hoyieqgz ATTORNEYS.

1931- J. HOGBERG ET AL ,5

CHAIN MAKING MACHINE Filed Jun 1, 1925 5 Sheets-Shet 2 3 1.. ll li llllLllllllgu K v i) "p BY flaw ATTORNEYS.

, Dec. 8, 1931.

mITmI mum J. L.IHOGBERG ET AL CHAIN MAKING MACHINE '5 Sheets-Sheet mnTmu; MW-

. INVENTORS.

ATTORNEYS.

Dec; 1931' J. L. HoGBER ET AL 1,335,593

CHAIN MAKING MACHINE Filed June 1, 1925 5 Sheets-Sheet 4' 1N VEN TORS 1931. J.--L. HOGBERG ET AL 1,835,593

CHAIN MAKING MACHINE Filed June 1,- 1925 I 5 Sheets-Sheet 5 INVENTOR A TTORNEYS.

BY I

Patented Dec. 8, 1931 JOHN L. noennne, or e'rinnnono,MAssAonUsErirs; Ann

enovn, nno-nn isnnnn, assienonsro GENERAL CHAIN nnonn ISLAND, A conroim'rion on MASSACHUSETTS ironn A. GRANSKOG, or HILLS cnam MAkiNe' 1r:noninn Application filed' jJ'une amount of solder retained at the joint so that when fiuxed'the abutting ends at the joint will be soldered together.

A further object of this invention is the provision of'means for feeding a continuouslength of solder wire at intervals oper ated in time with a-link-forming mechanism for positioning a portion of the solder wire between the separated ends offthe link loop and subsequently closing these ends onto the solder and then severing the solder Wire. I

A further object of thisrinvention is the positioning ofa short length of solder wire of a diameter less than that ofthe wire of the" link to which it is :applied' and theforcing of the link ends against this-solder with such force as to imbed the solder into the-softer metal of the link.

The invention further consists in the provision of means for feeding the solder wire in time with the operation of the link-forming means of the machine and to provide in this solder wire feeding mechanism a support for the end of-the wire which advances in close proximity to the link to which the wire has been fed for directing the solder wire'into' position between the open ends of the link wire, means being also providedfor subse quently withdrawing this wiresupport to permit an unobstructed rotating action-of the link-forming jaw-operating mechanism} With these and other objects in view {the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

in the accompanying drawings Figure 1 is a p'lanrview of a chain-making machine showing the means for feeding the wire from which the -different links are formed, also showing a supply of wire solder I ating mechanism.

1925. serial no; 33,969.

andlmean s for feeding this solder into posi tion to'be subsequently fused to close the joint thereof.' Figure 2 1s a sectional side elevation showing the solder wire feeding mechanism which is operated in time with the link-closing mechanism to position a shortclength of solder between the ends of the link prior to closing thes'aine.

Figure 3' is a central sectional elevation through the link bending jaws and their oper- Figure l is a top view of the solder Wire feeding mechanism partly 1n section.

' Figureh isa side elevation of the solder wire feeding me'chanism partly in sectionih lustrating the wire carrier as withdrawn'from advanced'position. 1

Figure-6 shows this solder wire feeding mechanism with the'wire carrier in advanced position and the wire feed pawlfthe latter COMPANY, OF PROVIDENCE,

being also shown in dottedlines in advanced position. 1

' igure '2 is a perspective detail view of this wire feed pawl with the spring adapted to normally hold it out of-wire en'gaging posi- Figure 8 is-a perspective view showing a portion of the trip latch operated by the feed pawl mechanism to release the wire clamping block and permit the pawl to advance the same wire. I a

Figure 9 is-a'detail illustrating the link wire asbeingfed'across the bending jaws and thro-ugh'the previously formed link and in position to be severed by the cutter.

Figure 10 is a sideelevation of the parts" shown in Figure 9withthe addition of the position to-besubsequently advanced; r V Figure ll showsthe length of wire as havmg been severed and the forming mandrel as having moved downwardly. and cooperating 1 solder wire as supported on its carrier in 1 too ' shown in Figure 13 and illustrating the solder wire as having been advanced between the ends of the link wire. 1

Figure 15 is a sectional elevation illustrating the anvil as having descended and closed the open ends of the link wire onto'the solder Wire.

Figure 16 is a side elevation of the parts shown in Figure 15 illustrating the anvilas' having closed the ends of the link wire onto the solder wire and also as having severed the solder wire an end of whlch isshown as being sprung downwardly from its original feeding plane.

1 Figure 17 is a greatly enlarged view showing the link and the strip of solder wire as positioned at the joint of the link, the body of the solder being imbedded into the metal of the link.

. Figure 18 is a sectional View illustrating the position of the solder as lying across the abutting ends of the link joint thereby providing the key of solder which serves to strengthen the joint of the link.

Figure 19 is a view illustrating thesolder wire as being in flat or ribbon form instead of circular in cross section, as shown in F igures 17 and 18.

In practice where chain is, formed with joints soldered together the usual method employed is that of using a so-called solder core wire from which the links are formed on the usual chain-making machine, and aft er the forming operation the chain is subjected to heat of a temperature suflicient to melt the solder core causing it to expand and so unite the links at the joints. Solder core wire of this construction is much more expensive than the unfilled wire and by the use of our improved attachment to the chain machine just the proper amount of solder is placed between the ends of the link wire at the joint thereof at the only point where it is required thus permitting the use of the less expensive unfilled wire and greatly reducing the cost of chain thus formed. After the chain is constructed with the insertion of the portion of solder at the joint,-it is subjected to a fluxing heat to unite the ends thereof, the same as is a chain formed of a solder core wire. This construction, however, has an advantage over thesolder core wire in that only enough solder is provided at the joint to close the same and each and every joint is positively supplied with solder, thus insuring a chain in which the joint of every link is properly soldered which is not the case with the solder core wire as in many lnstances the solder 1n a solder core wlre 1s not continuous in the core thereof and thus an open space where solder is absent,

cost and slight unreliability as to its soldering action, when subjected to a fiuxing heat often runs out over the ends of the link wire sufficiently to solder the adjacent links together at the joints, which is quite unsatisfactory. To obviate all these dimculties and at the same time reduce the cost of the chain and produce a stronger and better chain, we have provided simple and effective means for feeding a portion of solder between the ends ofthe link wireprior to closing these ends which closing action tightly grips the solder between them thus firmly holding the same in position until finally being subjected to a fiuxmg heat. Also, it is found in practice of advantage to use the so-called hard solder in this soldering operation which in many instances is harder than the metal of the link wire so that when the ends of the link wire are forced against the harder surface of the solder, the solder imbeds itself into the metal of the link and forms a laterally-disposed bar extending across the oints which serves asa key to assist in resisting an opening strainand also at the same time presents a greater soldering area which again assists in increasing the strength of the soldered joints; and the following is a detailed description ofthe present embodnnent of our invention showing one means by which the solder wire I1nay be positioned between the ends of thelink wire whereby the abovev .ed on this shaft for convenience in manipulating the mechanism. By this shaft 23, the link wire 26 is fed from the reel 27 by the feeding. cam 28 through the lever 29 across the bending jaws 30 against the stop 31 after which the'forming mandrel 3:2 is advanced by'means of the cam 33 through the lever 34 pivoted at 35 and is advanced over the length of wire fed across the open jaws 30, after which this mandrel 32 is depressed by the cam '37 through the lever 38, which is pivoted at 39, and the slide 40 to move the mandrel from the position shown in Figure 9 to that shown in Figure 11, after the usual severing operation by the downward movement of the knife 41 by cam 48 through lever 49 and at this time the jaws 80 are brought together by action of the cam 42 through the connector and practical in its operation and, the chain formed by our improved machine is less expensive owing to the fact that solid wire may be employed rather than the usual solder core wire, and the chain is muchstrongeras a whole than is chain formedgof the solder core wire, owing to the fact. that just the proper amount of solder is positively placed at the oint when the link isformed thereby eliminating the uncertainty of. obtaining proper amount of solder being at the joint which is the case where a solder core wire is used as it is often found in the drawing of solder core wire that the core .is broken and a space left along the coreof the wire which often affects the soldering action of the links. '7 I v v Theiforegoing description is directed solely towards the construction illustrated, but we desire it to-be understood that we reserve the privilege of resorting to all the meehanical changes to which the device is susceptible, the invention being definedand lim. ited. only by the terms of the appended claims.

We claim: v

1. In a chain machine, means for bending a length of wire into open loop form, means for, closing the loop, a reciprocating gripper for feeding a length of solder wire from a supplybetween the ends of said loop, amovable carrier for supporting the end of said wire in proximity to the open loop during the bending operation, and means for withdrawing said carrier to permit unobstructed sub sequent operations of the link-forming mechanism, means for supporting said formed link in position to have passed therethrough the wire for another loop, and means for transferring the bending means to the subsequently inserted wire for a repeated link forming operation. Y

Y 2. In a chain machine, means including a pair of jaws for bending a length of wire into open loop form, means for rotating said jaws, a slidable carrier for feeding a length of solder wire from a supply between the ends of said loop, said carrier also serving to support the end of said wire in proximity to the open loop during the bending operation, and means for withdrawing said carrier to permit an unobstructed'rotation of said jaws. V

3. In a chain-making machine, means .for bending a length of wire into open loop form, a slidable carrier for advancing solder wire, means actuating said carrier bodily. to position the solder wire adjacent the loop, means operable subsequent to the operation of said carrier for feeding said solder wire along said carrier to project the same between the separated ends of said loop, and means for closing the ends of said loop about the solder wire, all of said means operating automatically and in timed relation;

at. In a chainmaking'machine', means for bending a length of wire into open loop form,

a carrier for supporting solder wire, means for moving saidcarrier forward to a point adj acentthe ends of the wire loop, means operable at substantially the completion of forward movement of the carrier for moving the solder wire relative to said carrier to a position between the ends of the loop, means for closing the ends of the loop onto the solder to. form a link and means for severing the solder wire. 7 r

. 5. In a chain making machine, means for bending a length of wire into open loop form, a carrier for supporting solder wire, means for moving said carrier forward to a. point adjacent the ends of the wire loop, means operable after the start forward and before the return of said carrier for moving the solder wire relative to the carrier and to a position between the ends of the loop.

6. In a chain making machine, means for bending a length of wire into open loop form, acarrier'for supporting solder wire, means for moving said carrier forward to a point adjacent the ends of the wire loop, a pawl mounted for sliding movement on said carrier and positioned above said solder wire, means for actuating said pawl to move said solder wire forward relative to said carrier, the movement of said carrier and pawl serving to position the solder wire between the ends of the loop.

7. In a chain making machine, means for bending a length of wire into open loop form, a carrier for supporting solder wire, a pawl mountedfor sliding movement on said carrier and positioned above the solder wire, a lever, feed bars actuated by said lever, one bar serving'to move said carriage forward and the other serving to actuate said pawl and move the solder relative to said carriage, means for actuating said lever, and means for closing the ends of the loop and severing the solder wire.

8. In a chain making machine, means for bending a length of wire into open loop form, a carrier for supporting solder wire, means for clamping said solder wire on said carrier, means for moving said carrier forward toward the open wire loop, means for releasing said clamping means and feeding the solder wire forward relative to said carrier to positionthe solder wire between the ends of the loop, means for closing the ends of the loop onto the solder to form a link, and means for severing the solder wire.

9. In a chain making machine, means for bending a length of wire into open loop form, a carrier for supporting solder wire, means for clamping said solder wire on said carrier, means for moving said carrier forward to a point adjacent the ends of the wire loop, means operable at substantially the completion of forward movement ofthe carrier for releasing said clamping means and feeding the solder further forward to a position between the ends ofthe 100p, means for closing the ends of the loop and means for severing the solder wire.

In testimony whereof we affix our signatures.

JOHN L..HOGBERG.' JOHN A. GRANSKOG. 

